DI-718-USB on Windows XP

DI-718-USB on Windows XP

This is in reference to case #6564.  When I plug the USB cord in from my DI-718 and install the driver from C:\DATAQ\"DATAQ Instruments Drivers\usbftdi, I get the error;

There was a problem installing the hardware: DATAQ DI-718-USB
Windows cannot load the device driver for this hardware.  The driver may be corrupted or missing. (Code  39)

It seems like there should also be a driver under "Ports", that is used for communications with the XP computer.  Is this correct?  Please help.